Val-Matic 30 and Larger Butterfly Valve - Manual (Page 2)

1
CAUTION: Do not use valve for line testing
at pressures higher than
nameplate rating or leakage and
damage to valve may occur.
VAL-MATIC'S 30" AND LARGER BUTTERFLY VALVE
OPERATION, MAINTENANCE AND INSTALLATION
INTRODUCTION
The Series 2000 Butterfly Valve has been designed to
give years of trouble-free operation. This manual will
provide you with the information to properly install and
maintain the valve to ensure a long service life. The
valve is a resilient seated, quarter-turn valve capable of
handling air, water, or other clean fluids. For fluids with
suspended solids, a Model 5800R Eccentric Plug
Valve should be used. The Size, Cold Working
Pressure (CWP), and Model No. are stamped on the
nameplate for reference.
The "Cold Working Pressure" is the non-shock
pressure rating of the valve at 150
o F. The valve is
intended for flow in either direction. The “Seat End” is
marked on the nameplate so that access to the seat
can be assured.
RECEIVING AND STORAGE
Inspect valves upon receipt for damage in shipment.
Unload all valves carefully to the ground without
dropping. Do not lift valves with slings or chains
around the actuator or through the seat area. Extra
care must be taken when handling electric motor and
cylinder actuated valves.
Valves should remain crated, clean and dry until
installed to prevent weather related damage. For long
term storage greater than six months, indoor storage is
recommended. The valve flange covers must remain
in place, the valve must remain slightly open (3-5
degrees), and the rubber surfaces of the disc should
be coated with a thin film of FDA approved grease
such as Dow Corning # 7. Do not expose the resilient
seat to sunlight or ozone for any extended period.
Electric actuators must be powered if stored outdoors
or in cool areas so that the internal heaters will prevent
condensation in the control unit.
DESCRIPTION OF OPERATION
As shown in Figure 1, the valve consists of a body, a
disc, and a shaft that rotates in body bearings. The
resilient seat provides drop-tight shutoff.
FIGURE 1. BUTTERFLY VALVE WITH ACTUATOR
The disc is rigidly attached to the shaft with taper pins.
The actuator rotates the valve shaft and disc through
90 degrees of operation. The disc can rotate through
the seat, but is factory set to stop in the center of the
seat to provide tight shut off. Additional torque on the
actuator when against the closed stop of the actuator
will not provide tighter shut off. The valve seat is easily
adjustable or replaceable should wear or damage
occur over time.
The valve is typically operated with a manually
operated gear actuator. The gear actuator as shown in
Figure 1 requires multi-turn input on a 2" square nut,
handwheel, or chainwheel. The valve can also be
automated with power actuators such as an electric
motor or hydraulic cylinder.